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path: root/arch/sparc64/kernel/pci_msi.c
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Diffstat (limited to 'arch/sparc64/kernel/pci_msi.c')
-rw-r--r--arch/sparc64/kernel/pci_msi.c447
1 files changed, 0 insertions, 447 deletions
diff --git a/arch/sparc64/kernel/pci_msi.c b/arch/sparc64/kernel/pci_msi.c
deleted file mode 100644
index 2e680f34f72..00000000000
--- a/arch/sparc64/kernel/pci_msi.c
+++ /dev/null
@@ -1,447 +0,0 @@
-/* pci_msi.c: Sparc64 MSI support common layer.
- *
- * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
- */
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-
-#include "pci_impl.h"
-
-static irqreturn_t sparc64_msiq_interrupt(int irq, void *cookie)
-{
- struct sparc64_msiq_cookie *msiq_cookie = cookie;
- struct pci_pbm_info *pbm = msiq_cookie->pbm;
- unsigned long msiqid = msiq_cookie->msiqid;
- const struct sparc64_msiq_ops *ops;
- unsigned long orig_head, head;
- int err;
-
- ops = pbm->msi_ops;
-
- err = ops->get_head(pbm, msiqid, &head);
- if (unlikely(err < 0))
- goto err_get_head;
-
- orig_head = head;
- for (;;) {
- unsigned long msi;
-
- err = ops->dequeue_msi(pbm, msiqid, &head, &msi);
- if (likely(err > 0)) {
- struct irq_desc *desc;
- unsigned int virt_irq;
-
- virt_irq = pbm->msi_irq_table[msi - pbm->msi_first];
- desc = irq_desc + virt_irq;
-
- desc->handle_irq(virt_irq, desc);
- }
-
- if (unlikely(err < 0))
- goto err_dequeue;
-
- if (err == 0)
- break;
- }
- if (likely(head != orig_head)) {
- err = ops->set_head(pbm, msiqid, head);
- if (unlikely(err < 0))
- goto err_set_head;
- }
- return IRQ_HANDLED;
-
-err_get_head:
- printk(KERN_EMERG "MSI: Get head on msiqid[%lu] gives error %d\n",
- msiqid, err);
- goto err_out;
-
-err_dequeue:
- printk(KERN_EMERG "MSI: Dequeue head[%lu] from msiqid[%lu] "
- "gives error %d\n",
- head, msiqid, err);
- goto err_out;
-
-err_set_head:
- printk(KERN_EMERG "MSI: Set head[%lu] on msiqid[%lu] "
- "gives error %d\n",
- head, msiqid, err);
- goto err_out;
-
-err_out:
- return IRQ_NONE;
-}
-
-static u32 pick_msiq(struct pci_pbm_info *pbm)
-{
- static DEFINE_SPINLOCK(rotor_lock);
- unsigned long flags;
- u32 ret, rotor;
-
- spin_lock_irqsave(&rotor_lock, flags);
-
- rotor = pbm->msiq_rotor;
- ret = pbm->msiq_first + rotor;
-
- if (++rotor >= pbm->msiq_num)
- rotor = 0;
- pbm->msiq_rotor = rotor;
-
- spin_unlock_irqrestore(&rotor_lock, flags);
-
- return ret;
-}
-
-
-static int alloc_msi(struct pci_pbm_info *pbm)
-{
- int i;
-
- for (i = 0; i < pbm->msi_num; i++) {
- if (!test_and_set_bit(i, pbm->msi_bitmap))
- return i + pbm->msi_first;
- }
-
- return -ENOENT;
-}
-
-static void free_msi(struct pci_pbm_info *pbm, int msi_num)
-{
- msi_num -= pbm->msi_first;
- clear_bit(msi_num, pbm->msi_bitmap);
-}
-
-static struct irq_chip msi_irq = {
- .typename = "PCI-MSI",
- .mask = mask_msi_irq,
- .unmask = unmask_msi_irq,
- .enable = unmask_msi_irq,
- .disable = mask_msi_irq,
- /* XXX affinity XXX */
-};
-
-static int sparc64_setup_msi_irq(unsigned int *virt_irq_p,
- struct pci_dev *pdev,
- struct msi_desc *entry)
-{
- struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
- const struct sparc64_msiq_ops *ops = pbm->msi_ops;
- struct msi_msg msg;
- int msi, err;
- u32 msiqid;
-
- *virt_irq_p = virt_irq_alloc(0, 0);
- err = -ENOMEM;
- if (!*virt_irq_p)
- goto out_err;
-
- set_irq_chip_and_handler_name(*virt_irq_p, &msi_irq,
- handle_simple_irq, "MSI");
-
- err = alloc_msi(pbm);
- if (unlikely(err < 0))
- goto out_virt_irq_free;
-
- msi = err;
-
- msiqid = pick_msiq(pbm);
-
- err = ops->msi_setup(pbm, msiqid, msi,
- (entry->msi_attrib.is_64 ? 1 : 0));
- if (err)
- goto out_msi_free;
-
- pbm->msi_irq_table[msi - pbm->msi_first] = *virt_irq_p;
-
- if (entry->msi_attrib.is_64) {
- msg.address_hi = pbm->msi64_start >> 32;
- msg.address_lo = pbm->msi64_start & 0xffffffff;
- } else {
- msg.address_hi = 0;
- msg.address_lo = pbm->msi32_start;
- }
- msg.data = msi;
-
- set_irq_msi(*virt_irq_p, entry);
- write_msi_msg(*virt_irq_p, &msg);
-
- return 0;
-
-out_msi_free:
- free_msi(pbm, msi);
-
-out_virt_irq_free:
- set_irq_chip(*virt_irq_p, NULL);
- virt_irq_free(*virt_irq_p);
- *virt_irq_p = 0;
-
-out_err:
- return err;
-}
-
-static void sparc64_teardown_msi_irq(unsigned int virt_irq,
- struct pci_dev *pdev)
-{
- struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
- const struct sparc64_msiq_ops *ops = pbm->msi_ops;
- unsigned int msi_num;
- int i, err;
-
- for (i = 0; i < pbm->msi_num; i++) {
- if (pbm->msi_irq_table[i] == virt_irq)
- break;
- }
- if (i >= pbm->msi_num) {
- printk(KERN_ERR "%s: teardown: No MSI for irq %u\n",
- pbm->name, virt_irq);
- return;
- }
-
- msi_num = pbm->msi_first + i;
- pbm->msi_irq_table[i] = ~0U;
-
- err = ops->msi_teardown(pbm, msi_num);
- if (err) {
- printk(KERN_ERR "%s: teardown: ops->teardown() on MSI %u, "
- "irq %u, gives error %d\n",
- pbm->name, msi_num, virt_irq, err);
- return;
- }
-
- free_msi(pbm, msi_num);
-
- set_irq_chip(virt_irq, NULL);
- virt_irq_free(virt_irq);
-}
-
-static int msi_bitmap_alloc(struct pci_pbm_info *pbm)
-{
- unsigned long size, bits_per_ulong;
-
- bits_per_ulong = sizeof(unsigned long) * 8;
- size = (pbm->msi_num + (bits_per_ulong - 1)) & ~(bits_per_ulong - 1);
- size /= 8;
- BUG_ON(size % sizeof(unsigned long));
-
- pbm->msi_bitmap = kzalloc(size, GFP_KERNEL);
- if (!pbm->msi_bitmap)
- return -ENOMEM;
-
- return 0;
-}
-
-static void msi_bitmap_free(struct pci_pbm_info *pbm)
-{
- kfree(pbm->msi_bitmap);
- pbm->msi_bitmap = NULL;
-}
-
-static int msi_table_alloc(struct pci_pbm_info *pbm)
-{
- int size, i;
-
- size = pbm->msiq_num * sizeof(struct sparc64_msiq_cookie);
- pbm->msiq_irq_cookies = kzalloc(size, GFP_KERNEL);
- if (!pbm->msiq_irq_cookies)
- return -ENOMEM;
-
- for (i = 0; i < pbm->msiq_num; i++) {
- struct sparc64_msiq_cookie *p;
-
- p = &pbm->msiq_irq_cookies[i];
- p->pbm = pbm;
- p->msiqid = pbm->msiq_first + i;
- }
-
- size = pbm->msi_num * sizeof(unsigned int);
- pbm->msi_irq_table = kzalloc(size, GFP_KERNEL);
- if (!pbm->msi_irq_table) {
- kfree(pbm->msiq_irq_cookies);
- pbm->msiq_irq_cookies = NULL;
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static void msi_table_free(struct pci_pbm_info *pbm)
-{
- kfree(pbm->msiq_irq_cookies);
- pbm->msiq_irq_cookies = NULL;
-
- kfree(pbm->msi_irq_table);
- pbm->msi_irq_table = NULL;
-}
-
-static int bringup_one_msi_queue(struct pci_pbm_info *pbm,
- const struct sparc64_msiq_ops *ops,
- unsigned long msiqid,
- unsigned long devino)
-{
- int irq = ops->msiq_build_irq(pbm, msiqid, devino);
- int err, nid;
-
- if (irq < 0)
- return irq;
-
- nid = pbm->numa_node;
- if (nid != -1) {
- cpumask_t numa_mask = node_to_cpumask(nid);
-
- irq_set_affinity(irq, numa_mask);
- }
- err = request_irq(irq, sparc64_msiq_interrupt, 0,
- "MSIQ",
- &pbm->msiq_irq_cookies[msiqid - pbm->msiq_first]);
- if (err)
- return err;
-
- return 0;
-}
-
-static int sparc64_bringup_msi_queues(struct pci_pbm_info *pbm,
- const struct sparc64_msiq_ops *ops)
-{
- int i;
-
- for (i = 0; i < pbm->msiq_num; i++) {
- unsigned long msiqid = i + pbm->msiq_first;
- unsigned long devino = i + pbm->msiq_first_devino;
- int err;
-
- err = bringup_one_msi_queue(pbm, ops, msiqid, devino);
- if (err)
- return err;
- }
-
- return 0;
-}
-
-void sparc64_pbm_msi_init(struct pci_pbm_info *pbm,
- const struct sparc64_msiq_ops *ops)
-{
- const u32 *val;
- int len;
-
- val = of_get_property(pbm->op->node, "#msi-eqs", &len);
- if (!val || len != 4)
- goto no_msi;
- pbm->msiq_num = *val;
- if (pbm->msiq_num) {
- const struct msiq_prop {
- u32 first_msiq;
- u32 num_msiq;
- u32 first_devino;
- } *mqp;
- const struct msi_range_prop {
- u32 first_msi;
- u32 num_msi;
- } *mrng;
- const struct addr_range_prop {
- u32 msi32_high;
- u32 msi32_low;
- u32 msi32_len;
- u32 msi64_high;
- u32 msi64_low;
- u32 msi64_len;
- } *arng;
-
- val = of_get_property(pbm->op->node, "msi-eq-size", &len);
- if (!val || len != 4)
- goto no_msi;
-
- pbm->msiq_ent_count = *val;
-
- mqp = of_get_property(pbm->op->node,
- "msi-eq-to-devino", &len);
- if (!mqp)
- mqp = of_get_property(pbm->op->node,
- "msi-eq-devino", &len);
- if (!mqp || len != sizeof(struct msiq_prop))
- goto no_msi;
-
- pbm->msiq_first = mqp->first_msiq;
- pbm->msiq_first_devino = mqp->first_devino;
-
- val = of_get_property(pbm->op->node, "#msi", &len);
- if (!val || len != 4)
- goto no_msi;
- pbm->msi_num = *val;
-
- mrng = of_get_property(pbm->op->node, "msi-ranges", &len);
- if (!mrng || len != sizeof(struct msi_range_prop))
- goto no_msi;
- pbm->msi_first = mrng->first_msi;
-
- val = of_get_property(pbm->op->node, "msi-data-mask", &len);
- if (!val || len != 4)
- goto no_msi;
- pbm->msi_data_mask = *val;
-
- val = of_get_property(pbm->op->node, "msix-data-width", &len);
- if (!val || len != 4)
- goto no_msi;
- pbm->msix_data_width = *val;
-
- arng = of_get_property(pbm->op->node, "msi-address-ranges",
- &len);
- if (!arng || len != sizeof(struct addr_range_prop))
- goto no_msi;
- pbm->msi32_start = ((u64)arng->msi32_high << 32) |
- (u64) arng->msi32_low;
- pbm->msi64_start = ((u64)arng->msi64_high << 32) |
- (u64) arng->msi64_low;
- pbm->msi32_len = arng->msi32_len;
- pbm->msi64_len = arng->msi64_len;
-
- if (msi_bitmap_alloc(pbm))
- goto no_msi;
-
- if (msi_table_alloc(pbm)) {
- msi_bitmap_free(pbm);
- goto no_msi;
- }
-
- if (ops->msiq_alloc(pbm)) {
- msi_table_free(pbm);
- msi_bitmap_free(pbm);
- goto no_msi;
- }
-
- if (sparc64_bringup_msi_queues(pbm, ops)) {
- ops->msiq_free(pbm);
- msi_table_free(pbm);
- msi_bitmap_free(pbm);
- goto no_msi;
- }
-
- printk(KERN_INFO "%s: MSI Queue first[%u] num[%u] count[%u] "
- "devino[0x%x]\n",
- pbm->name,
- pbm->msiq_first, pbm->msiq_num,
- pbm->msiq_ent_count,
- pbm->msiq_first_devino);
- printk(KERN_INFO "%s: MSI first[%u] num[%u] mask[0x%x] "
- "width[%u]\n",
- pbm->name,
- pbm->msi_first, pbm->msi_num, pbm->msi_data_mask,
- pbm->msix_data_width);
- printk(KERN_INFO "%s: MSI addr32[0x%lx:0x%x] "
- "addr64[0x%lx:0x%x]\n",
- pbm->name,
- pbm->msi32_start, pbm->msi32_len,
- pbm->msi64_start, pbm->msi64_len);
- printk(KERN_INFO "%s: MSI queues at RA [%016lx]\n",
- pbm->name,
- __pa(pbm->msi_queues));
-
- pbm->msi_ops = ops;
- pbm->setup_msi_irq = sparc64_setup_msi_irq;
- pbm->teardown_msi_irq = sparc64_teardown_msi_irq;
- }
- return;
-
-no_msi:
- pbm->msiq_num = 0;
- printk(KERN_INFO "%s: No MSI support.\n", pbm->name);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 23:55:03 +0000